Self-Organized Amorphous TiO2 Nanotube Arrays on Porous Ti Foam for Rechargeable Lithium and Sodium Ion Batteries

Journal Article · Tue Jan 01 00:00:00 EST 2013 · Journal of Power Sources

DOI:https://doi.org/10.1016/j.jpowsour.2012.09.019· OSTI ID:1055050

Bi, Zhonghe ^[1]; Paranthaman, Mariappan Parans ^[1]; Menchhofer, Paul A ^[1]; Dehoff, Ryan R ^[1]; Bridges, Craig A ^[1]; Chi, Miaofang ^[1]; Guo, Bingkun ^[1]; Sun, Xiao-Guang ^[1]; Dai, Sheng ^[1]

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1. ORNL

Self-organized amorphous TiO2 nanotube arrays (NTAs) were successfully fabricated on both Ti foil and porous Ti foam through electrochemical anodization techniques. The starting Ti foams were fabricated using ARCAM s Electron Beam Melting (EBM) technology. The TiO2 NTAs on Ti foam were used as anodes in lithium ion batteries; they exhibited high capacities of 103 Ahcm-2 at 10 Acm-2 and 83 Ahcm-2 at 500 Acm-2, which are two to three times higher than those achieved on the standard Ti foil, which is around 40 Ahcm-2 at 10 Acm-2 and 24 Ahcm-2 at 500 Acm-2, respectively. This improvement is mainly attributed to higher surface area of the Ti foam and higher porosity of the nanotube arrays layer grown on the Ti foam. In addition, a Na-ion half-cell composed of these NTAs anodes and Na metal showed a self-improving specific capacity upon cycling at 10 Acm-2. These results indicate that TiO2 NTAs grown on Ti porous foam are promising electrodes for Li-ion or Na-ion rechargeable batteries.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1055050
• Journal Information: Journal of Power Sources, Vol. 222, Issue 1; ISSN 0378-7753
• Country of Publication: United States
• Language: English